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関連する概念動画

Stress: General Loading Conditions01:15

Stress: General Loading Conditions

To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes.
Stress Concentrations01:13

Stress Concentrations

The concept of stress concentration is crucial for understanding how materials respond under bending stresses, particularly when there are irregularities or discontinuities in the material's geometry. Normally, stress in a symmetric member subjected to pure bending is assumed to be uniformly distributed across the entire cross-section. However, this assumption does not hold when there are variations in the cross-sectional geometry or the presence of notches and holes.
The stress concentration...
Stress Concentrations01:24

Stress Concentrations

Stress concentration is when stress intensifies near discontinuities such as holes or abrupt cross-sectional changes in a structural member. This localized stress can often surpass the average stress within the member. The stress distribution in flat bars, either with a circular hole or varying widths connected by fillets, can be determined experimentally using a photoelastic method. The results are based on ratios of geometric parameters like the ratio of the hole's radius to the smaller width...
Stress on an Oblique Plane01:16

Stress on an Oblique Plane

Understanding stress on an oblique plane under axial loading is pivotal in material mechanics. This analysis offers insight into a material's durability and strength, which is crucial for civil engineering and structural design. Axial loading refers to force application along the material's central axis, causing compression or elongation and leading to normal stress. Normal stress occurs when a force acts perpendicularly to the material's area, resulting in compressive or tensile stress. When...
Principal Stresses01:24

Principal Stresses

The graphical depiction of normal and shearing stress equations is represented by a circle, demonstrating the interplay between these stresses under different angular conditions. The center of this circle C, located on the vertical axis, represents the average normal stress, while its radius shows the range of stress variations. At points A and B, where the circle intersects the horizontal axis, the maximum and minimum normal stresses are observed, occurring without shearing stress. These...
Stress01:20

Stress

When a force is applied on a body, it undergoes deformation. In order to restore the body to its original shape and/or size, an opposite or restoring force is generated within the body. This restoring force is equal to the magnitude of the applied force, but acts in the opposite direction. The amount of this restoring force developed per unit area of the body is called stress. Stress is a tensor quantity and has the SI unit pascal. Stress can be separated into four broad categories depending...

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Updated: Jun 27, 2026

Method for the Assessment of Effects of a Range of Wavelengths and Intensities of Red/near-infrared Light Therapy on Oxidative Stress In Vitro
08:16

Method for the Assessment of Effects of a Range of Wavelengths and Intensities of Red/near-infrared Light Therapy on Oxidative Stress In Vitro

Published on: March 21, 2015

ストレスの多いERを明るくする.

Sang-Wook Kang1, Ramanujan S Hegde

  • 1National Institutes of Health, Bethesda, MD 20892, USA.

Cell
|December 2, 2008
PubMed
まとめ
この要約は機械生成です。

研究者は特殊な光タンパク質を用いて,酵母におけるエンドプラズマ網膜 (ER) を観察した. これにより,ストレス下でのタンパク質の生産と成熟をERがどのように処理するかを理解することができました.

さらに関連する動画

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions
07:09

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions

Published on: May 2, 2019

関連する実験動画

Last Updated: Jun 27, 2026

Method for the Assessment of Effects of a Range of Wavelengths and Intensities of Red/near-infrared Light Therapy on Oxidative Stress In Vitro
08:16

Method for the Assessment of Effects of a Range of Wavelengths and Intensities of Red/near-infrared Light Therapy on Oxidative Stress In Vitro

Published on: March 21, 2015

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions
07:09

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions

Published on: May 2, 2019

科学分野:

  • 細胞生物学 細胞生物学
  • 分子生物学は分子生物学である.
  • バイオケミストリー バイオケミストリー

背景:

  • エンドプラズマ網膜 (ER) ホメオスタシスの維持は,細胞機能に不可欠です.
  • タンパク質の成熟とタンパク質の流れは,ER内でバランスをとらなければなりません.
  • ERの内部環境は,これらのプロセスにおいて重要な役割を果たします.

研究 の 目的:

  • 細胞の干渉に対するER環境のダイナミックな反応を調査する.
  • 生体細胞におけるERの酸化還元状態をモニタリングするための新しい方法を開発し,利用する.
  • タンパク質負荷の異なる条件下でERホメオスタシスがどのように維持されるかを理解する.

主な方法:

  • Saccharomyces cerevisiae (酵母菌) の遺伝的にコードされたリドックス感受性光タンパク質 (roGFP) を利用した.
  • ERの酸化還元力を監視するために,生細胞画像技術を使用した.
  • タンパク質の流れとERのストレスを変化させるための特定の混乱を導入しました.

主要な成果:

  • 異なる干渉に対する反応として,ERのリドックス環境のリアルタイムの変化を実証した.
  • ERリドックス状態の相関変化と,タンパク質の熟成能力.
  • ERの適応メカニズムについての洞察を提供しました.

結論:

  • ERリドックス環境は,タンパク質の流れに反応するダイナミックなパラメータです.
  • ERのリドックス状態のモニタリングは,ERのホメオスタシスを研究するための貴重なアプローチを提供します.
  • この研究は,ERがストレス下での機能を適応し維持する能力を明らかにしています.